title: Three-dimensional quantification of adhesive remnants on teeth after debonding.
abstract: BACKGROUND
  The objective of this study was to determine 3 dimensionally the amount of adhesive remaining on teeth after debonding orthodontic brackets.
  
  
  METHODS
  Three kinds of adhesives were investigated. Metal brackets were bonded to 45 extracted premolars (15 for each adhesive). Labial surfaces of the teeth were scanned before bonding and after debonding. Remaining volume, maximum height, mean maximum height, and mean height of the adhesive remaining on the tooth after debonding were determined, and adhesive remnant index (ARI) scores were measured. Data were analyzed with the Kruskal-Wallis test. Regression analysis was performed between each parameter for the remaining adhesive and the ARI.
  
  
  RESULTS
  Scanned profiles of the tooth surfaces after debonding showed the remaining adhesive clearly. Volume and mean height were significantly different by the type of adhesive (P <0.05). For the ARI scores, 2 resin-based adhesives showed similar trends; however, a smaller portion of the resin-modified glass ionomer adhesive remained on the teeth. Parameters for remaining adhesive and ARI scores showed significant correlations (r = 0.332-0.486; P <0.05).
  
  
  CONCLUSIONS
  Quantitative data for the remaining adhesive provides more detailed information about the debonded enamel surface.
authors.affiliation: Department of Dental Biomaterial Science and Dental Research Institute, College of Dentistry, Seoul National University, Seoul, Korea. ykleedm@snu.ac.kr
authors.forename: Yong-Keun
authors.initials: YK
authors.lastname: Lee
authors.forename: Yong-Kyu
authors.initials: YK
authors.lastname: Lim
mesh_terms: D000180:Acrylic Resins / Q000032:analysis; D000269:Adhesives / Q000032:analysis* / Q000737:chemistry; D000538:Aluminum Silicates / Q000032:analysis; D003188:Composite Resins / Q000032:analysis; D017005:Dental Debonding; D003743:Dental Enamel; D003799:Dental Stress Analysis; D006801:Humans; D021621:Imaging, Three-Dimensional; D008422:Materials Testing; D016910:Orthodontic Brackets; D012044:Regression Analysis; D019279:Resin Cements / Q000032:analysis
chemical_list: D000180:Acrylic Resins; D000269:Adhesives; D000538:Aluminum Silicates; D003188:Composite Resins; C095451:Fuji Ortho LC; C429652:Reliance Light Bond; D019279:Resin Cements; C477790:Transbond XT